I think it's probably too late to sow seeds now, but i'm happy to hear a second opinion. Maybe you can buy trays of plants. And for future reference, although they say you can sow seeds direct, it's actually a disaster doing that, as are spring onions btw.
There's lots to sow though - all the salads, carrots, beetroot, winter radish, moolii, fennel, courgettes, chicory and endive (if you can tell the difference :D ), dwarf french beans, and at the end of the summer, normal radishes and the chinese leaves like pak choi
